Pumps.



A. G. MATTSSON.

PUMP.

APPLICATION FILED MAR. 18, 1911.

1,017,106, I Patented Feb. 13,1912.

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PUMP. APPLICATION FILED MAB.18. 1911.

1,017,106, Patented Feb. 13,1912.

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ALFRED G. MATTSSON, OF DETROIT, MICHIGAN, ASSIGNOR TO GREAT LAKES ENGI- NEERING WORKS, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

PUMP.

To all whom z't may concern Be it known that I, ALFRED G. MATTSSON, a citizen of the United States of America, residing at Detroit,'in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Pumps, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to pumps more particularly designed for use in connection with condensers for engines, and it is the object of the invention to obtain a simplified construction, avoiding the use of springs and other parts liable to get out of order.

To this end the invention consists in the construction as hereinafter set forth.

In the drawings,-Figure l is a vertical central section through the pump; Fig. 2 is a horizontal section therethrough.

A is the pump barrel or casing which is of cylindrical form having a vertical axis, B is a double acting piston or plunger with in the pump barrel, C is an inlet formed by a circumferential series of ports at the center of the barrel, and D and E are valve chests at opposite ends of the barrel.

The upper valve chest D is formed by an enlarged portion A of the casing A in which is seated a head or partition plate F having a cylindrical series of valve ports G therein. These ports are preferably grated to provide supporting seats for the flexible valve disks H which are centered thereover by stud pins I. Secured to these same pins are circular heads J which form stops for limiting the upward movement of the valve disks. The studs I preferably have a threaded portion 1 for engaging a corresponding threaded aperture in the grating G and are also shouldered and threaded for engagement with the heads J as indicated at I I are lock-nuts on the threaded port-ion I and 1 are square or polygonal portions of the stud I projecting above said nuts. These squared portions are for the purpose of engagement with looking yokes K Which engage the adjacent studs and hold the same from turning, thereby preventing accidental disengagement.

The valve chest D is covered by a suitable head L, and hubs L and F upon the heads L and F form a bearing for the piston rod B and a suitable packing gland B Thus Specification of Letters Patent.

Application filed March 18, 1911.

Patented Feb. 13, 1912.

Serial No. 615,372.

with each upward stroke of the piston the fluid entering the barrel through the port C is lifted and forced through the ports G, lifting the valve H, which upon the down stroke of the piston are returned by gravity to their seats.

At the lower end of the casing A is a second valve chest D formed by an enlargement A of the casing. The valves cannot however, be arranged in this chest in the same manner as in the chest D without provision of some means other than gravity for seating them, and as I desire to avoid such complication I have devised the following construction: M is a head at the lower end of the barrel A and preferably formed integral therewith, which head has a central downwardly projecting tubular portion N terminating in the plane of the lower end of the enlargement A O is a recessed cap or cover for the lower end of the casing and P is a plate intermediate this cover'and the casing and in which a circular series of valve ports Q. are formed. The ports Q are preferably grated similar in construction to the ports G and are provided with studs I, valve disks H and heads J all of the same construction as above described. The plate P is held in position by screws or bolts engaging flanges in the enlarged portion A and at the lower end of the tubular portion N of the case, while the cap 0 is provided with a circular series of apertured studs O through which the bolts for engaging the flange M pass. Thus the fluid which is displaced from the pump barrel by the downward stroke of the piston will be forced down through the tube N into the recessed cap 0 and from there upward through the ports Q, in the plate P into the annular valve chest B, lifting the disk valves therein, which valves upon the return stroke of the piston are re-seated by gravity.

The admission of the fluid to the pump barrel is through an annular conduit or belt R arranged eccentrically about the barrel to distribute the fluid to the circumferential series of inlet ports C. The outlet conduit S communicates at its lower end to the annular valve chest D and at its upper end with the valve chest D, and both these outlet and inlet conduits are preferably formed integral with the barrel.

In operation, the pump is double-acting, admitting the fluid to the barrel through the central ports C at each end of the stroke of the piston and alternately lifting the fluid into the chest D and forcing it clownward through the tube N into the annular chest D. To avoid pounding due to the striking of the piston against the liquid in barrel, a relief connection T is preferably provided which as shown is a pipe connected into the barrel chest below the head F and extending upward and capped at its upper end. This: pipe contains a sufl icient volume of air to form a cushion to relieve the barrel from any sudden rise in pressure.

What I claim as my invention is:

1. In a pump, the combination with a barrel having a vertical axis and a reciprocatory piston therein, of an inlet conduit communicating with the central portion of the barrel and adapted to alternately discharge into the barrel upon opposite sides of the piston, a downward extension of the barrel provided with a central contracted passage, a surrounding annular valve chest in communicationwith the central passage, an upward extension of said barrel forming a second valve chest, a discharge conduit communicating with the upper and lower chests, and gravity seated Valves controlling communication between the chest and the barrel.

2. In a pump, the combination with a barrel having a vertical axis, and a reciprocatory piston therein, of an inlet conduit communicating with the central portion of the barrel adapted to alternately discharge into the latter upon opposite sides of the piston, a downward extension of the barrel having a central contracted passage and a surrounding annular chamber forming a valve chest, a recessed cap for closing said downward extension and forming a communication between the central passage and the annular surrounding chamber, an annular seat between said cap and said annular chamber having a circular series of valve ports therein, studs projecting upward from said seat centrally of the ports, gravity seated valve disks engaging said studs, an upward extension of the barrel forming a second valve chest, gravity seated valves therein, and a conduit connecting said valve chests forming a discharge outlet therefor.

3. In a pump, the combination with a barrel and a reciprocatory piston therein, of a valve chest at the end of the barrel, valves in said chest, controlling ports communicating with the barrel, and a pressure relief conduit communicating with the barrel below said chest and below the highest point of travel of the piston, said conduit having an elastic fluid trap therein, for the purpose described. i

In testimony whereof I alfix my signature in presence of two witnesses.

' ALFRED G. MATTSSON. Witnesses 7 JAMES P. BARRY, IVILLIAM PAGEL.

Conins of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

